Yuri, are you friends with Juantorena, the king of the "relampagos"? Lot's of people think Juanto was mixed or black but he was just a white guy with the "doo" other guys had back in the 70's, kind of a white guy's afro.
A sub-Saharan African is black. Whites from Zambia, SA and such are "Africans" in that they were born in Africa, but they are white Europeans. The troll hitting this thread is either an outstanding example of self-hate (no doubt getting brownie points from his soc professor) or some idiot getting in his required 12 hrs per week internet monitoring/trolling of "hate sites" as dictated by Hillel House.
Don (as usual) makes great points in his post. It is a fact that when the civil rights "era" hit, white sprinters disappeared. It was as if it were almost instantaneous, in 1968. That year was a seismic shift in track and field, in the US in general. The red-diaper kids had fully completed their coup and went to town in everything from sports to college riots. Sports Illustrated suddenly began subtle then not so subtle attacks on whites, white athletic ability. It's been on the upswing, increasing in force ever since.
In sports, as in "real life", blacks are far more likely to use drugs. Their "time horizon" is different from that of whites. Yes, there are whites who will use drugs, but they tend to weigh the pros and cons, etc. The blacks tend to reach out, grab them, and swallow them down like M&M's so to speak.